Nut-lock.



H. B. COX.

NUT LOCK.

. APPLICATION FILED 11110.22, 1910 Patented Augzl22, 1911.

Attorneys those on this hole is an 1;. jcox', or 'rExoLA, OKLAHOMA.

NUT-Loon.

good-994..

To allv whom it May concern: Be it known that I,

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This invention relates to nut locks, of that threads of a bolt by a side clutch; and the object of the same istop'roduce a nut lock of this character in which the clutch will be caused to take into the thread automatically as the nut is screwed home.

To this end the invention consists in the details of construction hereinafter more fully described and claimed, and as shown in the drawings wherein- Figurel is a central vertical section of a bolt and a nut embodying my invention, showing the nut being screwed idly upon the bolt. F i 2 is a similar section showing the. nut as ing screwed home against a washer. Fig.

Fig. 4: is a perspective View of the nut and its pawl. Fig. 5 is anenlarged perspective detail of the pawl alone.

In the drawings, the letter B designates a and N is a nut here shown as square and provided with internal threads engaging the bolt, all these parts as well as the washer shown in Fig. 2 being of no different construction from those in daily use.

Coming now more particularly to my presentinvention, I cut a recess 5 .in one corner of the'nut near one edge at a point :40 best seen in F i 1, this recess extending tangentially to t e nut opening 6 as-will be seen in Fig. 3, and in-the body of the nut at right angles to sa1d recess I form a .hole 7 "intersectin the recess as shown. Into driven or in some waysecured a pin 8 upon which is pivotally mounted the pawl best seen in Fig. 5 and whlch 1s preferably, of chilled steel so that it will harder than the threads of the bolt.

1 The pawl is by preference of a size to fit rather closely within the recess 5,'for which purpose it has a flattened body 10 with preferably parallel'edges'and asquare rear end- 12, 'and its upper rear corner is preferably rounded off asat 13'around the hole 14 through which the pin. 18 passes rather HUGH B. Cox, ,ga citizen of the United States, residing at Texola, in the county of Beckham' and State of;

5 Oklahoma, have invented a new and useful Nut-Lock, of which the following is a speci- 3 is a horizontal section through .the nut and the recess for the pawl bolt having a head H and thread T as usual,

1 Specification of Letters Patent. l te t Application filed December 22,1910. Seria1 No.598, 83 5, v v i ing. its rounded off corner 13' fit rather closely in the top of the recess as seen in Fig.1. The front or active end ofthisp'awl is beveled off at the upper edge to a slight degree as at 20, and at the lower edgeto a greater degree as at 21, so that itsextreme front end 22 stands in the plane of its rear wall but oblique to aline across thegpawl which would be parallel with its rear end 12. The inclination of the front end 2213 such that when the pawl is tipped .down. around its pivot as seen in Fig. 1 said edge w1ll pass entirely out of contact with the raised threadsflupon the bolt, and itis my preference that the pawl shall not swingout of the recess in the nut farther than as showln'inthis'view. j In use the parts are assembled'andTthe,

nutscrewed home. j As its inner face comes against the washer, the projectlng innerend;

ofthe pawl is lifted so that its body is turned around its pivot, and this action causes its sharp oblique front end 2203 cut.

through one or two of the tlireadson the bolt 'so that finally the parts come to rest' as shown in Fig. 2 and it is then impossible to turn the nut any farther. It is my intention that .the bevel of the front; end 22 shall .be such that as the pawl is being swung into its position shown in Fig.2.the or more retracted portion ofthe end 22 willpa'ss by the'threads on 'the'bolt until 7 the pawl hasfbeen almost completely-housed, which leaves the frontend 22 to make reliable connection with thesthread just, at

the time when the nut is screwed home;

-What 1s claimed as new is: -1-,

f 1. A 'nut'lock comprising a nut having v a recess tangential .to' 'its 'thread-aperture andopening through one face of. the nut, the v latter also having a hole i tersectin'g' the outer end of said recessat right angles thereto;- combined withv a pawl having a transverse hole through its'body' near its} outer end, its'inner' end 'being beveled off at different angles atits' upper and lower edges so that its sharp, ,extremity shall stand oblique to a transverse plane through its body, and a m' fixed m Said hole 'intjhe l l o nut and pii-otally engaging that int-he pawlwith some friction. 

